Table 3.
Factors affecting concordance between physicians' and parents' assessment of functional ability. Values are medians (interquartile range) unless otherwise indicated
| Concordance (N = 107) | Parent over-rating (N = 29) | Physician over-rating (N = 19) | P | |
| No. (%) female | 89 (83.2) | 17 (58.6) | 14 (73.7) | 0.02§ |
| ILAR category, no. (%)$ | ||||
| Oligoarthritis persistent | 41 (38.3) | 6 (20.7) | 4 (21) | 0.005§ |
| Oligoarthritis extended | 35 (32.7) | 9 (31) | 3 (15.8) | |
| Polyarthritis | 20 (18.7) | 5 (17.2) | 8 (42.1) | |
| Systemic arthritis | 7 (6.5) | 8 (27.6) | 4 (21.1) | |
| Psoriatic arthritis | 4 (3.8) | 1 (3.5) | 0 (0) | |
| ANA positive, no. (%) | 85 (79.4) | 19 (65.5) | 14 (73.7) | 0.25§ |
| Patients with = 5 joints involved | 31 (29.0) | 13 (44.8) | 15 (78.9) | <0.001₤ |
| Age at onset, years | 3 (1.7–5.5) | 3.1 (1.66–6) | 3.1 (1.68–6.58) | 0.86 |
| Age at visit, years | 11.87 (9.7–14.5) | 10.8 (8.9–14.6) | 15 (9–19.6) | 0.39 |
| Disease duration, years | 7.65 (5.63–10.1) | 6.9 (5.19–8.8) | 9.3 (6.2–13.4) | 0.14 |
| Physician's global assessment | 2.4 (0–5.8) | 2.5 (1.4–6.3) | 5 (1–8.3) | 0.23 |
| Parent's global assessment | 0.50 (0–3) | 1.45 (0.45–3.55) | 0.65 (0.45–3.7) | 0.11 |
| Parent's pain assessment | 0.6 (0–2.5) | 2 (0.55–5.2) | 1.2 (0–3) | 0.011 |
| Swollen joint count | 1 (0–3) | 2 (1–3) | 3 (0–11) | 0.036 |
| Tender joint count | 1 (0–3) | 2 (1–4) | 4 (2–12) | <0.001 |
| Restricted joint count | 1 (0–3) | 2 (0–5) | 5 (2–18) | <0.001 |
| Active joint count | 1 (0–3) | 2 (1–5) | 6 (2–16) | <0.001 |
| Morning stiffness, minutes | 0 (0–5) | 0 (0–10) | 0 (0–10) | 0.41 |
| ESR, mm/hour | 14 (10–27) | 21 (10–35) | 16 (10–21) | 0.29 |
| C-reactive protein, mg/dl | 0.1 (0.1–0.58) | 0.1 (0.1–1.44) | 1.16 (0.1–1) | 0.027 |
| JADI-Articular score | 0 (0–1) | 1 (0–2) | 3 (0–12) | <0.001 |
| JADI-extraarticular score | 0 (0–1) | 0 (0–1) | 0 (0–1.5) | 0.29 |
| Poznanski score, units (N = 84) | - 1.18 (- 2.8–0.095) | - 1.7(-3.1 – -0.05) | - 1.1 (-04 – -0.47) | 0.69 |
| CHQ-PhS | 52.91 (47.26–55.28) | 51.4 (44.4–52.9) | 50.9 (42.4–53.9) | 0.19 |
| CHQ-PsS | 49.95 (43.62–54.44) | 47.6 (42.5–51.2) | 50.3 (43–58.3) | 0.23 |
| C-HAQ score | 0 (0–0.25) | 0.3 (0–0.93) | 0.1 (0–0.75) | 0.004 |
| Steinbrocker class, no (%) | ||||
| I | 74 (69.2) | 20 (69) | 3 (15.8) | <0.001₤ |
| II-IV | 33 (30.8) | 9 (31) | 16 (84.2) | |
| Physician's categorical scale | ||||
| I | 73 (68.2) | 22 (75.9) | 0 (0.0) | < 0.001§ |
| II | 17 (15.9) | 4 (13.8) | 10 (52.6) | |
| III-VI | 17 (15.9) | 3 (10.3) | 9 (47.4) | |
| Parent's categorical scale | ||||
| I | 73 (68.2) | 0 (0.0) | 13 (68.4) | < 0.001§ |
| II | 17 (15.9) | 15 (51.7) | 2 (10.5) | |
| III-VI | 17 (15.9) | 14 (48.3) | 4 (21.1) | |
See Table 1 for abbreviations and score ranges. $For purposes of the analysis, patients with the ILAR category of undifferentiated arthritis (n = 15) were classified within polyarthritis and extended oligoarthritis categories based on the number of joints affected in first 6 months of disease.
Comparisons for all quantitative variables were made with the Kruskall-Wallis test. ₤Chi-square test; §Fisher Exact test.